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Biological anti-escape method for sealing CO2 in deep stratum

A technology of CO2 and formation, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of carbon dioxide leakage and escape, and achieve the effect of resource utilization

Active Publication Date: 2021-07-02
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that carbon dioxide is prone to leakage and escape, the present invention provides a method for sequestering CO in deep formations. 2 Biological Containment Methods

Method used

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  • Biological anti-escape method for sealing CO2 in deep stratum

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Embodiment 1

[0030] Example 1: The thin coal seam above the storage point is the target formation

[0031] In a certain place, carbon dioxide is stored in a coal seam 1000m underground. Through ground monitoring, it was found that CO 2 Leakage, escape to the surface. The ABAQUS software extended finite element method is used to determine that the leakage path is mainly micro-cracks, combined with ground monitoring, the scope of leakage and escape is determined.

[0032] The thin coal seam with a depth of 500m above the storage point was selected as the target stratum, and the straw biological liquefaction liquid was selected as the external hydrogen source. Injection wells and production wells are arranged in this coal seam with a distance of 350m, located in CO 2 Both sides of the leak path.

[0033] The biological bacteria solution is a mixture of bacteria enriched from coalbed methane produced water, including hydrogenotrophic methanogens, α-proteobacteria, β-proteobacteria, hydroge...

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Abstract

The invention provides a biological anti-escape method for sealing CO2 in a deep stratum, and belongs to the field of carbon dioxide emission reduction. The problem that carbon dioxide is prone to leaking and escaping can be solved. The biological anti-escape method comprises the following steps that geological data of a CO2 sealing point are collected, and a CO2 leakage path is determined; an injection well and a production well are arranged in the stratum above the sealing point; whether the total amount of the hydrogen source in the stratum meets the CO2 bioconversion requirement or not is detected; the biological liquid and the hydrogen-rich organic matter are injected into the selected stratum through the injection well; the content of methane and CO2 in the selected stratum is detected in real time, and the composition of microbial communities is regularly detected; the leakage and biotransformation degree of the sealed CO2 is evaluated, and the flora structure is adjusted; and the produced CH4 is extracted through the production well. According to the biological anti-escape method for sealing CO2 in the deep stratum, the CO2 conversion capacity of microorganisms is utilized, and leaked CO2 is converted into CH4 or organic matter above the sealing layer, so that CO2 dissipation is prevented; and meanwhile, the leaked CO2 can be recycled, and environmental protection and energy significance is achieved.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide emission reduction, and in particular relates to a deep formation sequestration CO 2 Biocontainment methods. Background technique [0002] Greenhouse gas emissions, mainly carbon dioxide, have caused global warming. Global warming has brought many impacts on the earth's ecosystem and the sustainable development of human society, such as melting ice caps, extreme weather and rising sea levels, which will endanger human life and survival. Therefore, the research and development and promotion of carbon dioxide emission reduction technology has become one of the important tasks of all countries in the world. [0003] So far, the measures to reduce carbon dioxide emissions mainly include: improving energy utilization efficiency; protecting the ecological environment and increasing vegetation area; vigorously promoting various clean energy sources, such as wind energy; implementing carbon dioxi...

Claims

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Application Information

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IPC IPC(8): E21B43/16E21B43/22E21B43/00C12N1/20C12R1/01C12R1/37
CPCE21B43/164E21B43/16E21B43/006C12N1/20Y02P90/70Y02E50/30
Inventor 梁卫国郭红光刘英超李治刚
Owner TAIYUAN UNIV OF TECH
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